Island



APPLICATION FILED SEPT 7 1920.

Patented June 21, 1921.

xiii- UNITED STATES PATENT OFFICE.

CURTAIN-ROLLER-OPERATING DEVICE.

Specification of Letters Patent. Patented June 21, 1921.

Application filed September 7, 1920. Serial No. 408,481.

To all whom it may concern:

Be it known that I, CHRISTOPHER J. Ho- GAN, a citizen of the United States, residing at Newport, in the county of Newport and State of Rhode Island, have invented new and useful Improvements in Curtain-Roller- Operating Devices, of which the following is a specification.

This invention relates to certain new and useful improvements in curtain roller operating device, and the primary object thereof is to provide a device of this type which is applied to the window casing and to one end of the roller so as to operate the latter with certainty and without possibility of disengagement of the usual pawl in socalled spring rollers and consequent unwinding of the spring.

Further, the invention aims to provide a device of this type which can be economically produced; which is simple in construction and which contains a minimum of parts subject to derangement. Further and other objects will be later set forth and manifested in the course of the following description.

In the drawings Figure 1, is a. side elevation of the invention, and

Fig. 2, is a section taken on line 2-2 of Fig. 1.

n proceeding in accordance with the present invention, a drum-like casing 1 is employed having a cover 2 and provided with a bottom extension 1' to which one end of a bracket 3 is connected by means of which latter the device may be attached to a window frame. A short shaft 4 is journaled at the base of the casing and has a small gear or pinion 5 keyed or otherwise rigidly mounted thereon, which latter meshes with a larger driving gear 5 rigidly mounted on a similar short shaft 6 journaled at about the center of the casing. Both of the shafts receive support at one end from the cover. A driving spring 7 encircles shaft 6 and is connected at one end to the latter and at its outer end to the casing as indicated at 8.

One end of the shaft 4 is enlarged or otherwise rovided with a socket 9 having a bore or interior of rectangular cross-section to conformably receive the rectangular pintle P with which one end of the shade roller is equipped. The exterior or periphcry of the plntle is formed with cams 1O terminating in shoulders 11, the latter for engagement with pivoted pawl 12 carried by the casing. the arrangement being of the pawl and ratchet type.

The opposite end of the shade roller has the usual round pin which is mounted in the usual round eyed brar-ket and is free at all times to rotate therein.

In operation, the spring maintains the gear 5 under constant tension and therethrough the pinion 5 and the socket in which the pintle P of the shade roller is received. The pawl acts to hold the socket against rotation and to raise the shade the latter is pulled down to cause one of the cams to lift the pawl out of engagement with the adjacent shoulder whereupon the shade is released and under the action of the spring and gears the socket is rotated rapidly to wind up the shade on the roller as customary with the spring rollers, the rapidly moving cams maintaining the pawl raised and inoperative. The pawl is limited in its upward movement by a stop 12 carried by the casing. From the foregoing it will be seen that the pawl has but a simple slight vertical movement and does not partake of the rotary movements of the roller such as is customary in spring rollers, consequently there is no possibility of the spring unwinding as in spring rollers.

Having thus described my invention, what I claim as new and desire to secure by Letters Patent is In a curtain roller operating device, a casing of cylindrical form having a radial pocket-extension formed on its periphery, said pocket formed with a small bearing in its cover and an axially alined larger hearing in the opposing wall and said casing being formed with axial shaft bearings, a shaft journaled in the latter bearings, a coiled spring mounted in the casing on the shaft for driving the same, a large gear fixed on the shaft, a second shaft journaled in the pocket and having one end portion terminating in an enlarged cylindrical part journaled in the larger pocket bearing and projecting therethrough, said projecting enargement being of uniform diameter throughout whereby it may be inserted from within the casing through said larger bearing and having peripheral ratchet teeth and an axial socket in its end to receive an end of a shade rod, said second shaft being formed with a peripheral flange contiguous to the inner end of the said cylindrical enlargement abutting the inner Wall of the pocket to prevent displacement of the shaft, a gear fixed on the second shaft in mesh with the large gear, and a pawl fixed on the casing for engaging the ratchet teeth.

In testimony whereof I have signed my name to this specification in the presence of two subscribin witnesses.

CHEISTOPHER J. HOGAN.

Witnesses JAMES HILL, JOSEPH A. MILLER. 

